D-Bus: Fix typo in DBusConnection.get_proxy support for GDBus clients
D-Bus: Fix typo in DBusConnection.get_proxy support for GDBus clients

flobrosch/vala-fixes,frida/vala,GNOME/vala,severinh/vala,Distrotech/vala,frida/vala,severinh/vala,GNOME/vala,tjol/vala-tjol,spidermonkdust/vala,kamanashisroy/aroop,flobrosch/vala-fixes,kamanashisroy/aroop,frida/vala,frida/vala,spidermonkdust/vala,GNOME/vala,severinh/vala,playya/vala,xdave/pvala,frida/vala,jessevdk/vala,rvu95/vala,rvu95/vala,GNOME/vala,Distrotech/vala,Distrotech/vala,tjol/vala-tjol,playya/vala,flobrosch/vala-fixes,rvu95/vala,spidermonkdust/vala,tjol/vala-tjol,jessevdk/vala,playya/vala,jessevdk/vala,kamanashisroy/aroop